Electric lamp



y 1 1929- L. o. PARKER ET AL 1,712,934

ELEGTRIC LAMP Filed Feb. 12, 1927 Patented May 14, 1929.

UNITED STATES PATENT OFFICE.

LESLIE o. PARKER AND LEO o. SI-IIPPY, or ANDERSON, INDIANA, assmnons T0 nnLco-nEMY CORPORATION, or DAYTON, OHIO, A eonronarron or DELAWARE.

ELECTRIC LAMP.

Application filed February 12, 1927. Serial 1W0. 167,831.

This invention relates to improvements in lamps and particularly the type of lamp used on motor vehicles and the like.

lit is among the objects of the present invention to provide means for securely tastoning the glass panel or lens of the lamp to the lamp body, said means being of simple structure and design and adapted to prevent loosening of the lens through vibration.

Further objects and advantages of the present invention will be apparent from the following description, reference being had to the accompanying drawing, wherein a preferred embodiment of one form of the present invention is clearly shown.

la the drawing:

Fig. l is a View of the lamp in side elevation, a portion thereof being broken away to show the cross sectional construction;

Fig. 2 is a front elevation of the expansible ring;

Fig. 3 is a view of the lens rim.

Referring to the drawing, the numeral 20 designates the lamp body shown in the form of a paraboloid, said body being provided with a; suitable lamp socket 21 for receiving an electric lamp bulb 22. The outer edge of the lamp body is provided with an inwardly extending flange 23.

The lens is designated by the numeral 24.

A split rim 25, made up of any suitable resilient material so that the ring is expansible, surrounds the lens. The front edge of the rim 25 is provided with an inwardly extending annular flange 26, while the other or rear edge has a laterally extending flange 27, provided with an inwardly extending edge 27*. An annular groove 28 is formed in the peripheral surface of the rim between the flanges 26 and 27, said groove being adapted to receive the inwardly extending flange 23 of the lamp body 20. The lens 24 tits in the rim 25, the front surface adjacent the edge of the lens engaging with the edge of the flange 26. 7

An. expansible member 29 is provided in the rim 25, said member having an annular flange which rests in the seat provided by the flange 27 and its inwardly extending edge 27, formed on said rim. This expansible member is in the form of a split ring and is made up of a material more resilient than the rim, so that it will exert an outward pressureon the flange 27 of the rim, thereby aiding in expanding said rim into locking engagement with the lamp body flange 23.

in the foregoing it may be seen that an inexpensive mounting means is provided for the lens of the lamp, which may vary considerably in diameter and thiclrness without necessitating alterations in the mounting means, said mounting means being of a resilient expansible character, thereby tending to eliminate the loosening up of the lens and consequent rattling.

lVhile the form of embodiment of the present invention as herein disclosed, constitutes a preferred form, it is to be understood that other forms might be adopted, all coming within the scope of the claims which follow.

What is claimed is as follows:

1. A lamp, comprising in combination, a lamp body; a lens; an expansible rim for said lens; and an expansible ring in said rim for retaining the lens therein and for expanding the rim into gripping engagement with the lamp body.

2. A lamp, comprising in combination, a lamp body; a lens; a split, expansible rim for said lens, said rim having a portion extending into the lamp body; and an expansible ring in said rim for holding the lens therein and for assisting the expansible rim tightly to grip the lamp body.

3. A lamp, comprising in combination, a lamp body having an inwardly extending annular flange; an expansible rim for said lens, the rim having an annular groove adapted to receive the flange of the lamp body; and an expansible ring in said rim for holding the lens in the rim, and for expanding the rim to cause proper engagement between the rim groove and lamp body flange, whereby the rim is securely held on the said lamp body.

4. A lamp, comprising in combination, a lamp body having an annular, inwardly extending flange; a lens; an expansible rim for said lens, provided with annular, inwardly extending flanges, one .out which is groove being a enga d by the lens, said rim having an an ar groove formed in its outer peripheral surface between the flanges, said da ted to receive the lamp body flange; an an annular expansible member-in the rim engaging the lens and the other rim flange for holding the lens in signatures.

LESLIE O. PARKER. LEO C. SHIPPY. 

